Quality is not even. There is the odd SRFI that is someone pushing
their pet project through despite many objections. There are also
many that are subsumed by other methods in PLT Scheme. Then there are
SRFIs, such as arrays, that are addresses multiple times as no-one can
agree on the right way of handling them. It is worth being aware of
them all, but concentrate on the most useful. I find the most useful
SRFIs are 1, 4, 13, 14, 19, 26, 42, and 43.
N.